Registry / devops / duplicate-dependencies-webpack-plugin

duplicate-dependencies-webpack-plugin

library1.0.2jsnpmunverified

A webpack plugin to detect and report duplicated dependencies in the bundle. Version 1.0.2, stable, maintained sporadically. Key differentiator: provides a hook-based architecture for custom reporting, unlike simpler duplicates plugins that only warn. Allows programmatic access to duplicate package data (name, version, root path, bytes) for integration with custom reporters or CI checks. Primarily used in webpack 4 and 5 projects to audit dependency duplication.

devops

npm install duplicate-dependencies-webpack-plugin

github ↗package ↗

INSTALL

IMPORT

SIG · DUPLICATE-DEPENDEN

duplicate-dependencies-webpack-plugin

devopsjavascriptv1.0.2

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

DuplicateReporterPlugin

✓ import { DuplicateReporterPlugin } from 'duplicate-dependencies-webpack-plugin'

✗ const { DuplicateReporterPlugin } = require('duplicate-dependencies-webpack-plugin')

Named export; use destructured import or require. ESM and CJS both supported.

default import

✓ import DuplicatePlugin from 'duplicate-dependencies-webpack-plugin'

✗ const DuplicatePlugin = require('duplicate-dependencies-webpack-plugin').default

Default export is the plugin constructor; in CJS, require returns the same as default export.

getHooks

✓ import DuplicatePlugin from 'duplicate-dependencies-webpack-plugin'; DuplicatePlugin.getHooks(compilation)

✗ DuplicatePlugin.getHooks // do not call statically without compilation

getHooks is a static method on the plugin class, requires compilation object from webpack.

Minimal webpack config adding DuplicateReporterPlugin to detect duplicate dependencies in output.

const { DuplicateReporterPlugin } = require('duplicate-dependencies-webpack-plugin'); module.exports = { entry: './src/index.js', output: { filename: 'bundle.js' }, plugins: [new DuplicateReporterPlugin()] };

Debug

Known issues

gotchaPlugin adds overhead for large bundles; may slow down build.

fix

Use only in development or CI, not production builds.

affects: >=0.0.0

deprecatedWebpack 4 hooks: compilation.hooks.additionalAssets may be deprecated in future webpack versions.

fix

Test with webpack 5; plugin is compatible.

affects: >=1.0.0

Errors

Common errors & fixes

TypeError: DuplicateReporterPlugin is not a constructor

Incorrect import or usage of DuplicateReporterPlugin as default export without destructuring.

fix

Use const { DuplicateReporterPlugin } = require('duplicate-dependencies-webpack-plugin') or const Plugin = require('duplicate-dependencies-webpack-plugin'); new Plugin()

Error: Cannot find module 'duplicate-dependencies-webpack-plugin'

Plugin not installed.

fix

Run npm install duplicate-dependencies-webpack-plugin --save-dev

Upgrade

Version history

1.0.2latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/fengzilong/duplicate-dependencies-webpack-plugin ↗

packagehttps://www.npmjs.com/package/duplicate-dependencies-webpack-plugin ↗